Multi-vendor interoperability for virtual private networking is essential in today’s networking environment due to the nature of business acquisitions, the need to extend corporate networks to contractors and partners, and the diverse equipment within company networks. To ensure customers have an open solution, Microsoft Windows Server 2003-based VPN technology is based on industry standards.
By supporting IETF industry standards, Microsoft delivers a VPN solution that will work with other standard-compliant devices or software systems, helping to lower the cost and complexity of supporting proprietary solutions. Customers who use standards-based technology are not locked into any given vendor’s proprietary implementations. Microsoft supports the IETF efforts to standardize VPN technology. To date, two major technologies are IETF standards:
• Layer Two Tunneling Protocol (L2TP)—a combination of PPTP and Cisco’s Layer 2 Forwarding, which evolved through the IETF standards process.
• Internet Protocol Security (IPSec)—an architecture, protocol, and related Internet Key Exchange (IKE) protocol, which are described by IETF RFCs 2401-2409.
The combination of these technologies is described in RFC 3193, an IETF Proposed Standard.
In addition to IETF standards-track technologies, Microsoft supports PPTP, created by the PPTP Industry Forum (US Robotics [now 3Com], 3Com/Primary Access, Ascend, Microsoft, and ECI Telematics.) PPTP is a published informational RFC (RFC 2637) and has many companies shipping third-party implementations.
For advanced security requirements, IPSec has emerged as a key technology. However, IPSec tunnel mode by itself does support legacy authentication methods, tunnel IP address assignment and configuration, and multiple protocols—all critical requirements for remote access VPN connections. To provide a truly interoperable solution, Windows Server 2003 uses L2TP in combination with IPSec to provide an interoperable, secure VPN solution.
L2TP has broad vendor support, particularly among the largest network access equipment providers, and has verified interoperability in a series of vendor-sponsored testing events.
[3] The Design Philosophy of the DARPA Internet Protocols by David D. Clark [M.I.T. Laboratory for Computer Science]
Token ring networks had significantly superior performance and reliability compared to early shared-media implementations of Ethernet (IEEE 802.3), and were widely adopted as a higher-performance alternative to shared-media Ethernet.
The Open Systems Interconnection (OSI) reference model has significantly influenced the development of internet protocol we use today. Created in the 1980’s by the International Standards Organization (ISO), a multinational body dedicated to worldwide agreement on international standards, this reference model has defined the entire network communication process into seven structured layers. In ascending order these layers are the physical, data link, network, transport, session, presentation, and application layers. The purpose of this model was, and still is, to simplify and set a standard for the design of communication and networking products that can communicate with each other, regardless of system differences.
Network Address Translation (NAT) is a standard used to allow multiple PCs on a private network to share a single, globally routable IPv4 address. NAT enables a user to have a large set of addresses internally and usually one address externally. The main reason NAT is often deployed is because IPv4 addresses are getting scarce. NAT is an immediate, but temporary, solution to the IPv4 address exhaustion problem that will eventually be rendered unnecessary with the deployment of the IPv6. The Internet Engineering Task Force has been aware of the impending depletion of the current address space for almost a decade.
Internet VPN is a solution that utilizes a shared infrastructure in a way that provides you high performance and strong security. Internet VPN offers you the benefits of a private network (security, controlled performance) with the advantages of public networks (flexibility, scalability, redundancy, load sharing, performance, and lower costs).
...vantage of the overall network design and implement usable subnets with virtual local area networks. Use encryption and encapsulation to secure communications of public segments to enable extranets and cross-Internet company traffic. Use items such as intrusion detection systems and firewalls to keep unauthorized users out and monitor activity. Taken together, these pieces can make a secure network that is efficient, manageable, and effective.
In the early 1980s, the International Organization for Standardization (ISO) recognized the need for a network model that would help companies create common network implementations. The OSI reference model, released in 1984, addresses this need. The OSI reference model became the primary architectural model for communications. Although other architectural models have been created, most network vendors relate their network products to the OSI reference model.
It has been demonstrated that a number of interoperable systems must be implemented to fully protect a network; a strategy known as Defense in Depth. Due to the multitude of security devices and device categories available, it can be very difficult to identify the correct tools for meeting security goals. Using the Defense in Depth strategy will require an understanding of the interactions between devices occuring within the network.
The latest version of the Internet protocol which we should be implemented is IPv4, also known as the TCP/IP structure. The reason why IPv4 is referred to as TCP/IP for the first two main protocols, out of its suite of protocols, which were developed by United States Defense Advanced Research Project Agency, also known as DARPA around the 1970s (Kozierok, 2005). ...
That's it. We have successfully installed and configured a multi-protocol VPN server using SoftEther. Now clients can connect to our server using L2TP, IPSec, SSTP, OpenVPN, etc.
To summarize, we are recommending the use of WPA-2 Enterprise protocols, VPN for remote access, Firewalls, Proxy Servers, and IDS for the DEM network.
A reliable environment for teams to exchange information in a secure manner may be a necessity for virtual teams; therefore, security can pose another challenge. Different types of projects may require different levels of security. A virtual private network may be necessary to ensure that information is passed securely to the desired recipients. Authentication and encryption techniques can guarantee secure transmission of electronic...
Virtual private networks (VPN) provide an encrypted connection between distributed sites over a public network (e.g., the Internet). By contrast, a private network uses dedicated circuits and possibly encryption. The basic idea is to provide an encrypted IP tunnel through the Internet that permits distributed sites to communicate securely. VPN's permit secure, encrypted connections between a company's private network and remote users through a third-party service provider. A VPN can grow to accommodate more users and different locations much easier than a leased line. In fact, scalability is a major advantage that VPN's have over typical leased lines (dedicated circuits). Unlike with leased lines, where the cost increases in proportion to the distances involved, the geographic locations of each office matter little in the creation of a VPN.
There are quite a number of VPN service providers all over the Internet for personal or coompany use today. Each of these providers offer qualities suitable for a person or company’s requirement. Not all of them are the same. However, a few providers distinguish themselves from the rest.
capacity and performance. However, as networks enable more and more applications and are available to more and more users, they become ever more vulnerable to a wider range of security threats. To combat those threats and ensure that e-business transactions are not compromised, security technology must play a major role in today's networks.